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fix: import missing Hermes sessions into WebUI chat #528

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fix: import missing Hermes sessions into WebUI chat #528

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f01aa3c
fix: incrementally sync webui sessions
SulthanZahran91 May 7, 2026
e317439
fix: prevent stale web app cache
SulthanZahran91 May 7, 2026
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42 changes: 41 additions & 1 deletion packages/server/src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -164,14 +164,54 @@ export async function bootstrap() {
logger.info('Auth enabled — token: %s', authToken)
}

// Cache policy + legacy service worker cleanup
const legacyServiceWorkerPaths = new Set([
'/service-worker.js',
'/sw.js',
'/ngsw-worker.js',
'/workbox-sw.js',
])

app.use(async (ctx, next) => {
if (legacyServiceWorkerPaths.has(ctx.path)) {
ctx.status = 200
ctx.type = 'application/javascript; charset=utf-8'
ctx.set('Cache-Control', 'no-store, no-cache, must-revalidate, proxy-revalidate')
ctx.set('Pragma', 'no-cache')
ctx.set('Expires', '0')
ctx.body = `self.addEventListener('install',event=>{self.skipWaiting();});
self.addEventListener('activate',event=>{event.waitUntil((async()=>{const keys=await caches.keys();await Promise.all(keys.map(key=>caches.delete(key)));await self.registration.unregister();const clientsList=await self.clients.matchAll({type:'window',includeUncontrolled:true});for(const client of clientsList)client.navigate(client.url);})());});
`
return
}

await next()

if (ctx.path === '/' ||
ctx.path === '/index.html' ||
(!ctx.path.startsWith('/api') &&
!ctx.path.startsWith('/assets/') &&
!ctx.path.startsWith('/upload') &&
!ctx.path.startsWith('/socket.io') &&
!ctx.path.includes('.'))) {
ctx.set('Cache-Control', 'no-store, no-cache, must-revalidate, proxy-revalidate')
ctx.set('Pragma', 'no-cache')
ctx.set('Expires', '0')
} else if (ctx.path.startsWith('/assets/')) {
ctx.set('Cache-Control', 'public, max-age=31536000, immutable')
}
})
console.log('[bootstrap] cache-control middleware registered')

// SPA fallback
const distDir = resolve(__dirname, '..', 'client')
app.use(serve(distDir))
app.use(async (ctx) => {
if (!ctx.path.startsWith('/api') &&
ctx.path !== '/health' &&
ctx.path !== '/upload' &&
ctx.path !== '/webhook') {
ctx.path !== '/webhook' &&
!legacyServiceWorkerPaths.has(ctx.path)) {
await send(ctx, 'index.html', { root: distDir })
}
})
Expand Down
233 changes: 124 additions & 109 deletions packages/server/src/services/hermes/session-sync.ts
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Original file line number Diff line number Diff line change
@@ -1,38 +1,25 @@
/**
* Sync Hermes sessions from all profiles on startup.
* Reads api_server sessions from Hermes state.db and imports into local DB.
* Only runs when local DB is empty (first startup).
* Reads webui/api_server sessions from Hermes state.db and imports missing sessions into local DB.
* Runs incrementally and skips sessions that were already mirrored.
*
* Uses sessions-db.ts query logic to properly aggregate session chains.
*/
import { readdirSync, existsSync } from 'fs'
import { resolve, join } from 'path'
import { homedir } from 'os'
import { randomBytes } from 'crypto'
import { getProfileDir } from './hermes-profile'
import { createSession, addMessage, updateSession } from '../../db/hermes/session-store'
import { createSession, addMessage, updateSession, getSession } from '../../db/hermes/session-store'
import { getDb } from '../../db/index'
import { logger } from '../logger'
import { listSessionSummaries as listHermesSessionSummaries } from '../../db/hermes/sessions-db'
import {
getSessionDetailFromDbWithProfile,
listSessionSummaries as listHermesSessionSummaries,
} from '../../db/hermes/sessions-db'

const HERMES_BASE = resolve(homedir(), '.hermes')
const PROFILES_DIR = join(HERMES_BASE, 'profiles')

/**
* Generate a UUID v4 without external dependencies
*/
function generateUuid(): string {
const bytes = randomBytes(16)
bytes[6] = (bytes[6]! & 0x0f) | 0x40 // Version 4
bytes[8] = (bytes[8]! & 0x3f) | 0x80 // Variant 10
return [
bytes.subarray(0, 4).toString('hex'),
bytes.subarray(4, 6).toString('hex'),
bytes.subarray(6, 8).toString('hex'),
bytes.subarray(8, 10).toString('hex'),
bytes.subarray(10, 16).toString('hex'),
].join('-')
}
const SYNC_SOURCES = ['webui', 'api_server'] as const

/**
* Get all available profile names including 'default'
Expand All @@ -50,130 +37,158 @@ function getAllProfiles(): string[] {
return profiles
}

function hasMatchingLegacyImport(profile: string, hermesSession: { source: string; started_at: number; title: string | null }): boolean {
const db = getDb()
if (!db) return false

const row = db.prepare(
`SELECT id FROM sessions
WHERE profile = ?
AND source = ?
AND started_at = ?
AND COALESCE(title, '') = COALESCE(?, '')
LIMIT 1`,
).get(profile, hermesSession.source, hermesSession.started_at, hermesSession.title) as { id: string } | undefined

return !!row
}

function isAlreadySynced(profile: string, localSessionId: string, hermesSession: { source: string; started_at: number; title: string | null }): boolean {
return !!getSession(localSessionId) || hasMatchingLegacyImport(profile, hermesSession)
}

/**
* Sync api_server sessions from a single profile.
* Sync configured Hermes session sources from a single profile.
* Uses sessions-db.ts query logic to properly aggregate session chains.
*/
async function syncProfileSessions(profile: string): Promise<{
synced: number
skipped: number
errors: string[]
}> {
const result = { synced: 0, errors: [] as string[] }

try {
// Use listSessionSummaries to get aggregated session chains
// This returns only root sessions with aggregated stats from the entire chain
const summaries = await listHermesSessionSummaries('api_server', 10000, profile)

logger.info(`[session-sync] profile '${profile}': found ${summaries.length} aggregated session chains`)

for (const hermesSession of summaries) {
// Skip ephemeral sessions (created internally by chat-run-socket)
if (hermesSession.id.startsWith('eph_')) continue
try {
// Generate new session ID for local DB
const newSessionId = generateUuid()

// Create session in local DB
createSession({
id: newSessionId,
profile,
model: hermesSession.model,
title: hermesSession.title || undefined,
})

// Get full detail including all messages from the session chain
const { getSessionDetailFromDbWithProfile } = await import('../../db/hermes/sessions-db')
const detail = await getSessionDetailFromDbWithProfile(hermesSession.id, profile)

if (!detail || !detail.messages) {
result.errors.push(`session ${hermesSession.id}: failed to load messages`)
logger.warn(`[session-sync] failed to load messages for session ${hermesSession.id}`)
continue
}
const result = { synced: 0, skipped: 0, errors: [] as string[] }

for (const source of SYNC_SOURCES) {
try {
// Use listSessionSummaries to get aggregated session chains.
// This returns only root sessions with aggregated stats from the entire chain.
const summaries = await listHermesSessionSummaries(source, 10000, profile)

logger.info(`[session-sync] profile '${profile}', source '${source}': found ${summaries.length} aggregated session chains`)

for (const hermesSession of summaries) {
// Skip ephemeral sessions (created internally by chat-run-socket)
if (hermesSession.id.startsWith('eph_')) continue

try {
// Use Hermes' stable session id in the local mirror so startup sync is idempotent.
const localSessionId = hermesSession.id

if (isAlreadySynced(profile, localSessionId, hermesSession)) {
result.skipped++
continue
}

// Get full detail including all messages from the session chain before mutating the mirror.
const detail = await getSessionDetailFromDbWithProfile(hermesSession.id, profile)

if (!detail || !detail.messages) {
result.errors.push(`session ${hermesSession.id}: failed to load messages`)
logger.warn(`[session-sync] failed to load messages for session ${hermesSession.id}`)
continue
}

// Create session in local DB
createSession({
id: localSessionId,
profile,
model: hermesSession.model,
title: hermesSession.title || undefined,
})

// Insert all messages from the entire chain
for (const msg of detail.messages) {
addMessage({
session_id: newSessionId,
role: msg.role,
content: msg.content,
tool_call_id: msg.tool_call_id,
tool_calls: msg.tool_calls,
tool_name: msg.tool_name,
timestamp: msg.timestamp,
token_count: msg.token_count,
finish_reason: msg.finish_reason,
reasoning: msg.reasoning,
reasoning_details: msg.reasoning_details,
reasoning_content: msg.reasoning_content,
codex_reasoning_items: msg.codex_reasoning_items,
// Insert all messages from the entire chain
for (const msg of detail.messages) {
addMessage({
session_id: localSessionId,
role: msg.role,
content: msg.content,
tool_call_id: msg.tool_call_id,
tool_calls: msg.tool_calls,
tool_name: msg.tool_name,
timestamp: msg.timestamp,
token_count: msg.token_count,
finish_reason: msg.finish_reason,
reasoning: msg.reasoning,
reasoning_details: msg.reasoning_details,
reasoning_content: msg.reasoning_content,
codex_reasoning_items: msg.codex_reasoning_items,
})
}

// Update session with aggregated stats from Hermes
updateSession(localSessionId, {
source: hermesSession.source,
user_id: hermesSession.user_id,
started_at: hermesSession.started_at,
ended_at: hermesSession.ended_at,
end_reason: hermesSession.end_reason,
message_count: detail.messages.length,
tool_call_count: hermesSession.tool_call_count,
input_tokens: hermesSession.input_tokens,
output_tokens: hermesSession.output_tokens,
cache_read_tokens: hermesSession.cache_read_tokens,
cache_write_tokens: hermesSession.cache_write_tokens,
reasoning_tokens: hermesSession.reasoning_tokens,
billing_provider: hermesSession.billing_provider,
estimated_cost_usd: hermesSession.estimated_cost_usd,
actual_cost_usd: hermesSession.actual_cost_usd,
cost_status: hermesSession.cost_status,
last_active: hermesSession.last_active,
preview: hermesSession.preview,
})
}

// Update session with aggregated stats from Hermes
updateSession(newSessionId, {
started_at: hermesSession.started_at,
ended_at: hermesSession.ended_at,
end_reason: hermesSession.end_reason,
input_tokens: hermesSession.input_tokens,
output_tokens: hermesSession.output_tokens,
cache_read_tokens: hermesSession.cache_read_tokens,
cache_write_tokens: hermesSession.cache_write_tokens,
reasoning_tokens: hermesSession.reasoning_tokens,
estimated_cost_usd: hermesSession.estimated_cost_usd,
last_active: hermesSession.last_active,
preview: hermesSession.preview,
})

result.synced++
logger.info(`[session-sync] synced Hermes session ${hermesSession.id} -> ${newSessionId} (${detail.messages.length} messages, thread_session_count=${detail.thread_session_count})`)
} catch (err: any) {
result.errors.push(`session ${hermesSession.id}: ${err.message}`)
logger.warn(err, `[session-sync] failed to sync session ${hermesSession.id}`)
result.synced++
logger.info(`[session-sync] synced Hermes session ${hermesSession.id} (${source}) -> ${localSessionId} (${detail.messages.length} messages, thread_session_count=${detail.thread_session_count})`)
} catch (err: any) {
result.errors.push(`session ${hermesSession.id}: ${err.message}`)
logger.warn(err, `[session-sync] failed to sync session ${hermesSession.id}`)
}
}
} catch (err: any) {
if (!err.message.includes('state.db not found')) {
result.errors.push(`${source}: ${err.message}`)
logger.warn(err, `[session-sync] failed to open state.db for profile '${profile}', source '${source}'`)
}
}
} catch (err: any) {
if (!err.message.includes('state.db not found')) {
result.errors.push(err.message)
logger.warn(err, `[session-sync] failed to open state.db for profile '${profile}'`)
}
}

return result
}

/**
* Main entry point: sync all profiles on startup
* Only runs if local DB is empty (first startup or after DB reset)
* Main entry point: incrementally sync missing Hermes web UI/API sessions.
*/
export async function syncAllHermesSessionsOnStartup(): Promise<void> {
// Check if local DB has any sessions - only sync if completely empty
const db = getDb()
if (!db) {
logger.info('[session-sync] SQLite not available, skipping Hermes sync')
return
}

const countResult = db.prepare('SELECT COUNT(*) as count FROM sessions').get() as { count: number } | undefined
const hasExistingSessions = countResult && countResult.count > 0

if (hasExistingSessions) {
logger.info('[session-sync] local DB has %d sessions, skipping Hermes sync', countResult!.count)
return
}

logger.info('[session-sync] local DB is empty, starting Hermes session sync...')
logger.info('[session-sync] local DB has %d sessions, starting incremental Hermes session sync...', countResult?.count ?? 0)

const profiles = getAllProfiles()
logger.info(`[session-sync] found ${profiles.length} profiles: ${profiles.join(', ')}`)

let totalSynced = 0
let totalSkipped = 0
let totalErrors = 0

for (const profile of profiles) {
const result = await syncProfileSessions(profile)
totalSynced += result.synced
totalSkipped += result.skipped
totalErrors += result.errors.length

if (result.errors.length > 0) {
Expand All @@ -187,5 +202,5 @@ export async function syncAllHermesSessionsOnStartup(): Promise<void> {
}
}

logger.info(`[session-sync] sync complete: synced=${totalSynced}, errors=${totalErrors}`)
logger.info(`[session-sync] sync complete: synced=${totalSynced}, skipped=${totalSkipped}, errors=${totalErrors}`)
}
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